Permalink format: singular or plural

The default is singular, e.g.

http://example.com/category/apple/

But I am wondering if it is better to use the plural form, e.g.

http://example.com/categories/apple/

Are there any guideline on this?

There’s a simple rule that I follow (it’s hard to explain, so I’ll give examples):

• http://example.com/categories/ <– This plural form should mean that the page shows a list of all the categories in use on your site.

  Similarly, if it’s “authors” (as in http://example.com/authors/), I’d expect the page to show a list (with or without descriptions — is your choice) of authors.

• Simply put, you can’t use “category” (as in http://example.com/category/) and list all the categories under it. Kinda sounds meaningless, right? The point is, you never know when you’d have to create a listing as such => it’s always best to leave out “plural” words for unless you have a specific/definite purpose (which makes sense).

• Also, people expect a URL to be a precise description of the page. For example, in my own case, when the title of an article in Google isn’t descriptive enough, I look at the URL of the article to see if it’s even close to what I am searching for. Just saying.

  Simply compare http://example.com/category/technology/ versus http://example.com/categories/technology/

  • http://example.com/category/technology/ tells me that I am going to the technology category on example.com

  • If I see http://example.com/categories/technology/ my brain needs to think a little bit, and it will of course (in most cases), come to understand it like this — I am going to a page about technology which is one of the categories on example.com)

• Sometimes, URLs are structured to show content hierarchy. Take a look at this site’s URL structure, for example (Notice it? Yeah, “questions”.): http://wordpress.stackexchange.com/questions/53474/permalink-format-singular-or-plural

  http://wordpress.stackexchange.com/questions/ takes you to a list of all the questions on WP.SE ^[1]. 53474 is the post ID. That’s it these are the essential parts as far as the system is concerned. The descriptive part of the URL, i.e. permalink-format-singular-or-plural is meant for search engines, and the visitors coming from search engines (AFAIK).

  The content hierarchy here? Home > Questions > Post (or say, Question) —- this made more sense to the people who built the Stack Exchange network, and so, they went ahead it.

  • The point should be clear by now — whatever you use in your URL, people can absolutely relate to it. There’s no way it’s NOT going to make sense at all. The point is, do you want to make easier on the brains of your readers/visitors? Then use the form of word (singular/plural) that makes more sense — precisely, in your case, the singular word makes sense => http://example.com/category/apple/

[1]: WP.SE => WordPress.StackExchange.com